wont stay running...again

hey all its been a while since ive been here, been too busy with school for any free time. im having issues with the slant in my scamp though. it will only run in park or neutral and only with a pretty high idle. once you shift into drive or any other running gear for that matter it stalls out. if the gas is on it will stay but once it slows below about 15 mph it stalls. tried adjusting timing, that worked once before but seems to not have an effect now. msybe im timing it wrong? any help there or other ideas would be really helpful. also i dont think it is the choke because it was running in park to warm up and the choke opened up so...

please help i need this car running as its my only car now.